The greatest success in the club’s history came in 1977/78 with the Double of league title and DFB Cup. It also remains the narrowest championship win in Bundesliga history. Never has the title race been decided more tightly than on 29 April 1978. While leaders Köln faced already relegated St.
Pauli in Hamburg, challengers Borussia Mönchengladbach welcomed Borussia Dortmund in Düsseldorf and the biggest goal-shootout in league history unfolded. Gladbach beat Dortmund 12-0 - yet Köln became champions thanks to a goal difference better by exactly three. FC won 5-0 at St.
Pauli and were kept informed via radio about the record scoreline in Düsseldorf, which still stood in December 2019. Bernd Cullmann, Heinz Flohe twice and Yasuhiko Okudera scored in the rain of Hamburg as Cologne sealed their second Bundesliga title. Both Rhineland rivals finished the season with 86 goals.